In pictures: Celebrities show their support for the Bring Back Our Girls movement

Spanish actor Antonio Banderas, member of the cast of The Expendables 3, holds a cardboard reading Bring Back Our Girls, as a sign of support for the kidnapped Nigerian schoolgirls, while posing on the red carpet during the 67th edition of the Cannes Film Festival in Cannes, France, on May 18, 2014. Loic Venance / AFP photo

Gerard Butler holds up a sign reading Read Men Don’t Buy Girls in support of the movement. Courtesy Gerard Butler

The cast of The Expendables 3, from left, Kelsey Grammer, Wesley Snipes, Sylvester Stallone, Ronda Rousey and Mel Gibson hold up banners reading, Bring Back Our Girls, part of a campaign calling for the release of nearly 300 abducted Nigerian schoolgirls being held by Nigerian Islamic extremist group Boko Haram, as they arrive for the screening of The Homesman at the 67th international film festival in Cannes, France on May 18, 2014. Alastair Grant / AP photo

Amy Poehler holds up a #BringBackOurGirls sign in support of the Nigerian schoolgirls. Courtesy Amy Poehler

Adam Schulman and his wife Anne Hathaway hold up signs showing their support for the Bring Back Our Girls campaign. Courtesy Anne Hathaway

CNN anchor Christiane Amanpour and prime minister David Cameron hold up the sign #Bring Back Our Girls in support of the kidnapped Nigerian girl students. Courtesy CNN

Michelle Obama holds a #BringBackOurGirls sign. Courtesy The White House

Pakistani activist Malala Yousafzai supporting a social media campaign over the abduction of 276 schoolgirls in Nigeria last month, flooding social media with posts using the hashtag: #BringBackOurGirls. Courtesy EPA.

French director Lisa Azuelos, left, and French actress Julie Gayet, right, hold a sign #BringBackOurGirls as they arrive for the screening of Saint Laurent during the 67th annual Cannes Film Festival, in Cannes, France, 17 May 2014. Sebastien Nogier / EPA

A number of celebrities have been photographed showing their support for the Bring Back Our Girls movement in protest of nearly 300 abducted Nigerian schoolgirls by Nigerian Islamic extremist group Boko Haram.